All

tonic-clonic seizure

ton·ic clon·ic sei·zure

/ˈtänik clänik ˈsēZHər/

Noun

Seizures that typically last between 60 and 90 seconds characterized with uncontrollable contraction of the patient’s muscles, which causes them to stiffen and often causes the patient to fall to the ground, follwed by involuntary contractions and relaxation of the skeletal muscles, causing the patient to jerk.